Evacuate Building as LuigiOnce Luigi awakens, follow the Goombas through the door to your left. Now continue left, going through every door you come across, until you eventually trigger a cut-scene at the end of a long hallway.

Find Heart PillarBack in Flipside, travel to Flipside Outskirts, via the path found outside Merlon's house while in 3D. Travel down the pipe, then scurry across the gaps to the far side to find another pipe. Use Boomer to destroy the blocks preventing access, then take it down.

Pit Stop Redux!

Although we've mentioned this before, we thought it'd a good idea to bring it to your attention once more in case you missed it the first time. After exiting the pipe, fall into the crevice coming up to find a secret pit containing two chests. One contains a Merlon card, the other a Merluvlee card. Jackpot! Now use the spring to return to the surface.

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On the basement's first floor, skip past the warp pipe to the wall at the end. Once there, flip to 3D to find a small slit you can fit through with Slim's powers, where you'll find the third Heart Pillar.

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Enter World 3With the World 3 door revealed, use the Return Pipe to reach it quickly.

Pit Stop! Pit of 100 Trials

If you have time to spare, you might as well check out the second basement floor. To reach it, take the warp pipe you passed earlier, just before the slit in the wall leading to the Heart Pillar.

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Travel to the far wall and leap onto the top block. Now it may appear there's no where to go from here, but looks can be deceiving. Point the Wii Remote at the screen to find a series of hidden blocks - click on each one to make it visible, then use them to cross the gap.

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When you reach the silhouette of the door, flip to 3D and run down the hallway that appears to find a Blue Switch. Jump on it to open the way to the Pit of 100 Trials. While you can enter the Pit at any time, we recommend coming back much later in the game, after you've leveled up significantly.